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Find the possible value or values of r in the quadratic equation r2 -7r-8=0
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3 votes
Find the possible value or values of r in the quadratic equation r2 -7r-8=0

User Casady
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1 Answer

3 votes
r^2+r-8r-8=0
r(r+1)-8(r+1)=0
(r+1)(r-8)=0
r+1=0, r=-1
r-8=0 , r=8

answer: r=-1 or r=8
User Arvin
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